The air-hybrid engine absorbs the vehicle kinetic energy during braking, puts it into storage in the form of compressed air, and reuses it to assist in subsequent vehicle acceleration. In contrast to electric hybrid, the air hybrid does not require a second propulsion system. This approach provides a significant improvement in fuel economy without the electric hybrid complexity.The paper explores the fuel economy potential of an air hybrid engine by presenting the modeling results of a 2.5L V6 spark-ignition engine equipped with an electrohydraulic camless valvetrain and used in a 1531 kg passenger car. It describes the engine modifications, thermodynamics of various operating modes and vehicle driving cycle simulation. The air hybrid modeling projected a 64% and 12% of fuel economy improvement over the baseline vehicle in city and highway driving respectively. This is possible without reducing the vehicle weight to compensate for additional hardware and without reducing engine displacement.


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    Titel :

    Using Camless Valvetrain for Air Hybrid Optimization


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Tai, Chun (Autor:in) / Barta, Guido (Autor:in) / Levin, Michael B. (Autor:in) / Schechter, Michael M. (Autor:in) / Tsao, Tsu-Chin (Autor:in)

    Kongress:

    SAE 2003 World Congress & Exhibition ; 2003



    Erscheinungsdatum :

    2003-03-03




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Using camless valvetrain for air hybrid optimization

    Tai, C. / Tsao, T.C. / Levin, M.B. et al. | Tema Archiv | 2003


    Using camless valvetrain for air hybrid optimization

    Tai,C. / Tsao,T.C. / Levin,M.B. et al. | Kraftfahrwesen | 2003


    Electro-Hydraulic Camless Valvetrain System Modeling

    Asgari, J. / Hrovat, D. / American Society of Mechanical Engineers | British Library Conference Proceedings | 2001


    Electro-hydraulic camless valvetrain system modeling

    Asgari, J. / Hrovat, D. | Tema Archiv | 2001


    Adaptive lift control for a camless electrohydraulic valvetrain

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